IN DEPTH ENVIRONMENTAL RETROFITS
CARBON CAPTURE 'MILESTONE' FOR SCORPIO
Beşiktaş Shipyard has retrofitted a tanker with innovative carbon capture technology, writes Clive Woodbridge
I
n July, Scorpio Tankers’ STI Spiga, a 2015-built crude oil tanker, called at Beşiktaş Shipyard in Turkey
extensive glass-reinforced epoxy (GRE) and steel piping installations, covering seawater, exhaust, steam, air and freshwater pipes; and the final integration with existing vessel systems.
for the installation of a modular onboard carbon capture system (OCCS). The main scope of works included: structural modifications; the installation of the OCCS foundations and CO2
storage tank;
Sergio adds: “We overcame these challenges through careful coordination with the owner's technical team and on-site representatives. We were also able to take advantage of our in-house fabrication capacity for GRE piping and steel structures.”
Beşiktaş Shipyard was responsible for executing all of the onboard works, based on engineering documentation and 3D scanning data provided by the owner and its engineering partner. The vessel stayed in the yard for around 50 days for the retrofit, as well as for work connected with the vessel’s second special survey and exhaust gas scrubber-related modification work.
The carbon capture system installed on board was a containerised OCCS unit developed by US-based Carbon Ridge. The modular container- based design allowed for installation on deck with minimal intrusion into internal spaces and for direct connection to the existing auxiliary engine and boiler exhaust systems, via a common manifold.
Other features include a seawater-cooled absorption process and onboard CO2
liquefaction
and storage capability; an interface with steam, compressed air and freshwater utility systems; and integration with existing fire detection, alarm and automation systems.
“Complex retrofit” According to Beşiktaş Shipyard marketing manager Roberto Sergio: “This approach offers several advantages in retrofit scenarios, including its ease of installation due to having a self-contained design and a reduced need for major vessel redesign or long off-hire periods. In addition, it offers scope for future scalability and removal, depending on operational needs.”
Sergio continues: “The main challenge of this project lay in executing a complex retrofit within an existing vessel layout, while adapting to spatial limitations and ensuring seamless integration with legacy systems. Since the engineering and 3D scanning items of work were provided by the owner, Beşiktaş Shipyard’s role was to translate these plans into onboard execution.”
Some of the key challenges included navigating tight space constraints during routing and installation and
28 THE NAVAL ARCHITECT
Compact design The project was something of a milestone in terms of the retrofit of carbon capture systems onboard ocean-going tonnage, as this represented the first ever deployment of a centrifugal OCCS. The captured CO2
duration of the voyage.
Chase Dwyer, CEO and founder of Carbon Ridge, says: “Unlike other OCCS solutions, which are designed to be deployed on land and then adapted
Scorpio Tankers’ STI Spira entered dock at Beşiktaş Shipyard for the installation of the Carbon Ridge onboard carbon capture system
implementing hull penetrations, support structures and foundations without impacting vessel strength. The yard also had to ensure alignment and fitting accuracy with prefabricated components, especially GRE piping and exhaust manifolds.
is compressed, liquefied and stored safely for the
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